private void setUpBackgroundWorker()
{
Action <List <FileListViewItemViewModel> > updateSubEntries = (result) =>
{
List <FileListViewItemViewModel> delList = new List <FileListViewItemViewModel>(SubEntriesInternal.ToArray());
List <FileListViewItemViewModel> addList = new List <FileListViewItemViewModel>();
foreach (FileListViewItemViewModel model in result)
{
if (delList.Contains(model))
{
delList.Remove(model);
}
else
{
addList.Add(model);
}
}
foreach (FileListViewItemViewModel model in delList)
{
SubEntriesInternal.Remove(model);
}
foreach (FileListViewItemViewModel model in addList)
{
SubEntriesInternal.Add(model);
}
DirectoryCount = (uint)(from model in SubEntriesInternal where model.EmbeddedModel is DirectoryModel select model).Count();
FileCount = (uint)(SubEntriesInternal.Count - DirectoryCount);
HasSubEntries = SubEntriesInternal.Count > 0;
};
bgWorker_LoadSubEntries = new BackgroundTaskManager <List <FileListViewItemViewModel> >(
() =>
{
IsLoading = true;
return(getEntries());
},
(result) =>
{
updateSubEntries(result);
IsLoading = false;
});
bgWorker_FilterSubEntries = new BackgroundTaskManager <List <FileListViewItemViewModel> >(
() =>
{
IsLoading = true;
return(filterEntries());
},
(result) =>
{
updateSubEntries(result);
IsLoading = false;
});
}
protected override void FetchData(bool refresh)
{
base.FetchData(refresh);
if (bgWorker_LoadSubEntries == null)
{
setUpBackgroundWorker();
}
if (!IsLoaded)
{
refresh = true; //Not loaded before, force refresh.
SubEntriesInternal.Clear();
}
if (refresh)
{
Refresh();
}
}